997071620 has 96 divisors (see below), whose sum is σ = 2316625920. Its totient is φ = 359152640.

The previous prime is 997071617. The next prime is 997071629. The reversal of 997071620 is 26170799.

It is a happy number.

997071620 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is not an unprimeable number, because it can be changed into a prime (997071629) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 546029 + ... + 547851.

It is an arithmetic number, because the mean of its divisors is an integer number (24131520).

Almost surely, 2^997071620 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 997071620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1158312960).

997071620 is an abundant number, since it is smaller than the sum of its proper divisors (1319554300).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

997071620 is a wasteful number, since it uses less digits than its factorization.

997071620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1925 (or 1923 counting only the distinct ones).

The product of its (nonzero) digits is 47628, while the sum is 41.

The square root of 997071620 is about 31576.4409014062. The cubic root of 997071620 is about 999.0229189569.

The spelling of 997071620 in words is "nine hundred ninety-seven million, seventy-one thousand, six hundred twenty".